<?php

  // 0 1 1 2 3 5 8 13 21 34 55
  #  a b c
  #    a b c
  #      a b c
  #        a b c

  $a = 0;
  $b = 1;
  printf("$a $b ");

  for ($i = 1; $i <= 10 ; $i++)
  {
    $c = $a + $b;
    $a = $b;
    $b = $c;
    printf("$c ");
  }

